Improvement in cores for casting



we; @die Letters Patent No. 110,038, dated Decemberl, 1870.

IMPROVEMENT IN CORES FR `CASTING.

The Schedule referred to In theseLetters Patent and making part of thesame.

To all whom it may concern Be it knownl that I, J oHN HERALD, ofUnadillain the county of v Otsego and State of New York, have invented-anew and improved Sand-Holder for Gast#A ing Hook-shaped Straps; and 'l.do hereby declare that the following is a full, clear, and exactdescrlption-thereof', which will enable others skilled in the art tomake anduse the same, reference being had to theaccompanying drawingforming part of thisspecification.

' Figure lrepresents a face or topyiew of a hook-g shaped strap,containing my sand-holder under the Figure 2 isan edge Vview of thesame.

Figure 3 is a plan riew,`on an enlarged scale, of fthe sand-holder;v

AFigure 4 is a transverse section ofthe rs:m1e, takeu fon the plane ofthe line x x, iig. 3.

Similar letters of reference indicate corresponding parts.

The object of this invent-ion is to provide a rigid or stable mold whichcan be inserted between the spaces intended for the casting of the mainbody or shank of 'a strap-o1' plate, and the turned-over car or hook ofthe same.

The invention consists in the usc, for the stated purpose, of a metallic=case or sand-holder, in which the sand for the said mold is contained.

Fig. l represents a strap or plate of the nature referred to, holdingbetween its shank or body, @,-and turned-'over hook or ar,b, thesand-holder B, which was instrumental in the formation of said hookduring the'proccss of casting. This sandfholder B is a metalliccase orrim, open or closed at the bottoni, and filled with sand when applied.Heretofore the'portion of t-heinold used for the stated purpose was madeof sand alone, and therefore not readily removable from the iinishedplates w-thout being destroyed, unless previously baked' and hardened byspecialprocess.v This process of baking alnlhardening involvedconsiderable expensive labor, without giving perfectly 'satisfactoryresults.v

The lnetalliccase oljholder B will retain th'c requi- 'sitc quantity ofsand fora" suitable length of time,

and can be handled, applied, and removed with perfect liberty and ease.It need not only be iilled with saiid, but may, if desired, bc also inpart or entirely surroiinded with sand, as indicated by ,dotted liliesin fig. 4, the' nietal serving as a brace or rib for holdingthe'outers'and properly in place.

It is evident'that the invention is applicable to the casting of allhook-shaped plates or. devices, between hook and shank.

Having thus described my invention,

I claim as new and desire to secure by Letters' Patent- 1 The metallicsand-holder B, arranged for application between the `hook and shank of ahook-shaped plateor article to be cast, substantially as herein`shownand described.

' JOHN HERALD.

Witnesses A. V.BRIESEN, T. 15. MosHEn.

